docs: def _handle_continuations(self, response, cache_key):
          """
          Select continue params and clear cache or last continue params
          """
          rcontinue = response.get('continue')
          listen = ['blcontinue', 'cmcontinue', 'plcontinue']
          cparams = {}
  
          if rcontinue:
              for flag in listen:
                  if rcontinue.get(flag):
                      cparams[flag] = rcontinue.get(flag)
  
          if cparams:
              self.data['continue'] = cparams
              del self.cache[cache_key]
          else:  # no more continuations
              if 'continue' in self.data:
                  del self.data['continue']